I'm very very new to QGIS, I'm creating a small GIS project for the planet Mars. It's going along nicely so far, it's easy to find basemaps and the like from open data sources like PIGWAD and MOLA. But, I'm trying to map mars' elevation, but the only data I can find are jpg or tiff files (see MOLA link). The goal is to create a basic hillshade with GDAL or something similar, but all the tutorials I can find use GeoTiff datasets from SRTM so...the question is how do I get the DEM datasets for mars or is there a way to use the jpg/tiff files for analysing elevation/terrain data?
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If this is likely to be open data you could try the Open Data Stack Exchange.– PolyGeo ♦Commented Sep 3, 2017 at 20:32
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2Many DEMs are rasters, so what's the problem? GeoTIFF is just a particular form of a TIFF file.– mkennedyCommented Sep 3, 2017 at 20:58
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1 Answer
I think the problem here is understanding what a DEM really is. A dem is a digital elevation model, mostly a raster that displays the elevation per pixel. A GeoTIFF is a georeferenced raster image. A DEM can be displayed as a GeoTIFF file. You can work with geotiffs using gdal.